About Theodora Fragkouli

Theodora has graduated from Computer Engineering and Informatics Department in the University of Patras. She also holds a Master degree in Economics from the National and Technical University of Athens. During her studies she has been involved with a large number of projects ranging from programming and software engineering to telecommunications, hardware design and analysis. She works as a junior Software Engineer in the telecommunications sector where she is mainly involved with projects based on Java and Big Data technologies.

The “Mark & Sweep” implementation of previous versions is now replaced by the RGenGC (Restricted Generational Garbage Collection) implementation. As Ruby developer Koichi Sasada had observed in April 2013, the challenge was to implement a GC algorithm that could handle both protected and unsafe objects in the same heap.

RGenGC implementation uses Write-Barriers so as to avoid rewriting all existing C-extensions to use the new GC. In RubyConf 2013, Sasada showed how RGenGC provides a third way given the 2 original alternatives: A) Do not implement generational GC at all (as in Ruby 2.0 & before) or B) Implement Generational GC with a requirement that all C-extensions are rewritten.

RgenGC is compatible with existing extensions and also provides performance improvements. Array, String, Hash, Object, and Numeric are all Write-Barrier protected objects, so the RGenGC system can be used in these cases. Work on both internal and external libraries will offer the possibility of additional performance gains in the future.

Other very important improvements, appart from the garbage collection system include RDoc 4.1.0, RubyGems 2.2.0, and several updated libraries. You can find a full list of 2.1 release changes at the release notes located at the project’s GitHub page.

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